.price{
    background-color: #6C6B6B;
  }
  .price-header{
    text-align: center;
    padding: 50px 0;
    color: #ffffff;
  }
  .price-header h1{
    font-weight: 100;
    margin-bottom: 20px;
  }
  .price-header span{
    font-size: 14px;
  }
  .price-body{
    display: flex;
  }
  .price-box{
    margin: 40px 50px 0;
    width: 33%;
    text-align: center;  
    border: solid 1px #ffffff;  
  }
  
  .price-box-header{
    background-color: #c4c4c4;
    padding: 20px 0;
    color: #ffffff;
  }
  .price-box-header h3{
    font-size: 24px;
    margin-bottom: 5px;
  }
  .price-box-header span{
    font-size: 14px;
  }
  .price-box-body{
    background-color: #ffffff;
    color: #222222;
    padding: 30px 0;
  }
  .price-box-body p{
    margin-bottom: 20px;
    color: #333435;
    font-size: 14px;
  }
  /* 
  1.类选择符
  2.层次选择符
  3.nth-of-type选择符   CSS3
  */
  .price-box-body p:nth-of-type(1){
    font-size: 24px;
    font-weight: 900;
  }
  .price-box-body p:nth-last-of-type(1){
    font-size: 18px;
    font-weight: 900;
  }
  .price-box-body button{
    display: block;
    width: 200px;
    margin: 0 auto;
    height: 40px;
    color: #ef4f19;
    border: solid 1px #ef4f19;
    border-radius: 10px;
    background-color: transparent;
    font-size: 18px;
    cursor: pointer;
  }
  .price-box-body button:hover{
    background-color: #ef4f19;
    color: #ffffff;
  }
  .price-box-body span{
    margin: 30px 0;
    display: inline-block;
  }
  .price-box-body span a{
    color: #ef4f19;
    text-decoration: none;
  }
  /* 
  1.类选择符
  2.层次选择符
  3.直接子元素选择符  CSS3
  4.nth-of-type选择符   CSS3
  */
  .price-box:nth-of-type(2){
    margin-top: 0;
  }
  .price-box:nth-of-type(2) .price-box-header{
    background-color: #ef4f19;
  }
  .price-box:nth-of-type(2) .price-box-body button{
    background-color: #ef4f19;
    color: #ffffff;
  }
  .price-box:nth-of-type(2) .price-box-body button:hover{
    background-color: transparent;
    color: #ef4f19;
  }